We experimentally demonstrate a new scheme for generating amplitude-squeezed solitons in an asymmetric fiber Sagnac loop. We measure by direct detection what is to our knowledge a record reduction of 5.7±0.1 dB (73%) and, with corrections for linear losses, 6.2±0.1 dB (76%) in the photon-number fluctuations below the shot-noise level. The same scheme is also shown to generate significant classical noise reduction and is limited by Raman effects in fiber.
© 1998 Optical Society of America
Dmitriy Krylov and Keren Bergman, "Amplitude-squeezed solitons from an asymmetric fiber interferometer," Opt. Lett. 23, 1390-1392 (1998)